Abstract
A new approach to extreme value theory is presented for vector data with heavy tails. The tail index is allowed to vary with direction, where the directions are not necessarily along the coordinate axes. Basic asymptotic theory is developed, using operator regular variation and extremal integrals. A test is proposed to judge whether the tail index varies with direction in any given data set.
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Mark M. Meerschaert was partially supported by NSF grant DMS-1025486 and NIH grant R01-EB012079.
Stilian A. Stoev was partially supported by the NSF grant DMS–1106695 at the University of Michigan.
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Meerschaert, M.M., Scheffler, HP. & Stoev, S.A. Extreme value theory with operator norming. Extremes 16, 407–428 (2013). https://doi.org/10.1007/s10687-012-0166-x
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DOI: https://doi.org/10.1007/s10687-012-0166-x
Keywords
- Operator regular variation
- Heavy tails
- Directional extremes
- Spectral representation
- Parametric bootstrap
- Hetero-ouracity